26631306690 has 32 divisors (see below), whose sum is σ = 63949395456. Its totient is φ = 7097875200.

The previous prime is 26631306683. The next prime is 26631306731. The reversal of 26631306690 is 9660313662.

It is a super-2 number, since 2×26631306690² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180786 + ... + 293165.

It is an arithmetic number, because the mean of its divisors is an integer number (1998418608).

Almost surely, 2^26631306690 is an apocalyptic number.

26631306690 is an abundant number, since it is smaller than the sum of its proper divisors (37318088766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26631306690 is a wasteful number, since it uses less digits than its factorization.

26631306690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475834.

The product of its (nonzero) digits is 209952, while the sum is 42.

The spelling of 26631306690 in words is "twenty-six billion, six hundred thirty-one million, three hundred six thousand, six hundred ninety".